Main Unit; Circuit Diagram - Vertex Standard VX-131 Service Manual

3.9 V
2.8 V
3.0 V
2.2 V
0.8 V
2.9 V
RX: 4.2 V
4.2 V
TX: 0 V
5.0 V
4.9 V
RX: 0 V
TX: 4.2 V
RX: 5.0 V
TX: 0 V
5.0 V
5.0 V
5.0 V
3.0 V
3.5 V
2.6 V
0.7 V
RX: 3.5 V
RX: 0 V
TX: 0 V
TX: 3.7 V
TX (2 W): 1.7 V
RX: 0 V
TX: 1.0 V
RX: 0 V
TX: 0.3 V
RX: 0 V
TX: 3.5 V
1.5 V
2.2 V (@25 °C)
RX: 0 V
TX: 5.0 V
5.0 V
RX: 0 V
TX: 5.0 V
4.9 V
1.0 V
TX (2 W): 1.7 V
TX (2 W): 1.7 V
TX (2 W): 1.6 V
CH 1: 4.9 V
CH 2: 0 V
SQL "CLOSE": 5.0 V
SQL "OPEN": 0.6 V
GREEN "ON": 0 V
GREEN "OFF": 5.0 V
RED "ON": 0 V
RED "OFF": 5.0 V
7.5 V
4.3 V
5.0 V
RX: 5.0 V
TX: 0 V
RX: 5.0 V
TX: 0 V
5.0 V
RX SAVE "OFF": 5.0 V
RX: 5.0 V RX: 5.0 V RX SAVE "OFF": 5.0 V RX SAVE "OFF": 0 V
TX: 4.4 V TX: 0 V
RX SAVE "OFF": 4.4 V RX SAVE "OFF": 5.0 V

MAIN Unit

Circuit Diagram

5.0 V
1.9 V
0.7 V
W: 3.1 V
W: 5.0 V
N: 1.9 V
N: 1.2 V
W: 3.1 V W: 3.7 V
N: 1.9 V
N: 0 V
W: 3.7 V
N: 0 V
MUTE "ON": 5.0 V
MUTE "OFF": 0 V
MUTE "ON": 5.0 V
MUTE "OFF": 1.0 V SQL "CLOSE": 0.9 V
SQL "OPEN": 0.6 V
5.0 V
5.0 V
SQL "CLOSE": 0.2 V
SQL "OPEN": 7.4 V
5.0 V
W: 5.0 V
N: 0 V
5.0 V
5.0 V
PTT "ON": 4.8 V
PTT "OFF": 0 V
PTT "ON": 0 V
PTT "OFF": 5.0 V
7.5 V
21